/*
 * Copyright 2005 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.core.spi;

import org.drools.core.rule.Declaration;
import org.drools.core.WorkingMemory;

public interface EvalExpression
    extends
    Invoker,
    Cloneable {
    
    public Object createContext();
    
    public boolean evaluate(Tuple tuple,
                            Declaration[] requiredDeclarations,
                            WorkingMemory workingMemory,
                            Object context ) throws Exception;

    public void replaceDeclaration(Declaration declaration,
                                   Declaration resolved);
    
    public EvalExpression clone();
}
